remcos | b884daea2d9b42c3ba7a183381c78d9d9022c77dda6242d1d06a42d0ef678f8b

Analysis

max time kernel
150s
max time network
145s
platform
windows10-2004_x64
resource
win10v2004-20241007-en
resource tags

arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
submitted
19-11-2024 14:05

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General

Target

Comprovante_de_pagamento.pdf.exe
Size

145KB
MD5

3cef41ea126aa53d1d98c1fdf6ff5ce2
SHA1

f0a8c1041e05baf14600307b722f59fd0349ab5f
SHA256

16adbc2a26d4dd6a5c2c74f9631947184c72d8e244e0ceb34d531ef07d852939
SHA512

926b92948bd7f146da56ecd6ffb0c0926ec04c36635a0cfc7e742dd8c98c213d3a90da2ebfa4e23fb36e8652b9ffb4a07a447df9c351ab863e5f3d276a3b4b57
SSDEEP

3072:p5sUNEt0g9dCXurh4wpvkIMZxaRo/1AxY9UN6vI1dvPKwdqTub:pBqxY986Q4

Score

10^/10

remcos remotehost discovery persistence rat

Malware Config

Extracted

Family

remcos

Botnet

RemoteHost

212.162.149.42:7118

Attributes

audio_folder
MicRecords
audio_record_time
5
connect_delay
0
connect_interval
1
copy_file
remcos.exe
copy_folder
Remcos
delete_file
false
hide_file
false
hide_keylog_file
false
install_flag
false
keylog_crypt
false
keylog_file
logs.dat
keylog_flag
false
keylog_folder
remcos
mouse_option
false
mutex
Rmc-YP127Q
screenshot_crypt
false
screenshot_flag
false
screenshot_folder
Screenshots
screenshot_path
%AppData%
screenshot_time
10
startup_value
Remcos
take_screenshot_option
false
take_screenshot_time
5

Signatures

Remcos
Remcos is a closed-source remote control and surveillance software.
rat remcos
Remcos family
remcos
Suspicious use of NtCreateUserProcessOtherParentProcess 1 IoCs

Processes:

Comprovante_de_pagamento.pdf.exe

description pid process target process

PID 4336 created 3376 4336 Comprovante_de_pagamento.pdf.exe Explorer.EXE

description	pid	process	target process
PID 4336 created 3376	4336	Comprovante_de_pagamento.pdf.exe	Explorer.EXE

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

Processes:

Comprovante_de_pagamento.pdf.exe

description	ioc	process
Set value (str)	\REGISTRY\USER\S-1-5-21-1045960512-3948844814-3059691613-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Cumcoyy = "C:\\Users\\Admin\\AppData\\Roaming\\Cumcoyy.exe"	Comprovante_de_pagamento.pdf.exe

Suspicious use of SetThreadContext 1 IoCs

Processes:

Comprovante_de_pagamento.pdf.exe

description pid process target process

PID 4336 set thread context of 1652 4336 Comprovante_de_pagamento.pdf.exe InstallUtil.exe

description	pid	process	target process
PID 4336 set thread context of 1652	4336	Comprovante_de_pagamento.pdf.exe	InstallUtil.exe

System Location Discovery: System Language Discovery 1 TTPs 2 IoCs

Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

discovery

System Language Discovery

T1614.001

Processes:

Comprovante_de_pagamento.pdf.exeInstallUtil.exe

description	ioc	process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	Comprovante_de_pagamento.pdf.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	InstallUtil.exe

Suspicious behavior: EnumeratesProcesses 1 IoCs

Processes:

Comprovante_de_pagamento.pdf.exe

pid process

4336 Comprovante_de_pagamento.pdf.exe
Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

Comprovante_de_pagamento.pdf.exe

description pid process

Token: SeDebugPrivilege 4336 Comprovante_de_pagamento.pdf.exe
Token: SeDebugPrivilege 4336 Comprovante_de_pagamento.pdf.exe

pid	process
4336	Comprovante_de_pagamento.pdf.exe

description	pid	process
Token: SeDebugPrivilege	4336	Comprovante_de_pagamento.pdf.exe
Token: SeDebugPrivilege	4336	Comprovante_de_pagamento.pdf.exe

Suspicious use of WriteProcessMemory 12 IoCs

Processes:

Comprovante_de_pagamento.pdf.exe

description	pid	process	target process
PID 4336 wrote to memory of 1652	4336	Comprovante_de_pagamento.pdf.exe	InstallUtil.exe
PID 4336 wrote to memory of 1652	4336	Comprovante_de_pagamento.pdf.exe	InstallUtil.exe
PID 4336 wrote to memory of 1652	4336	Comprovante_de_pagamento.pdf.exe	InstallUtil.exe
PID 4336 wrote to memory of 1652	4336	Comprovante_de_pagamento.pdf.exe	InstallUtil.exe
PID 4336 wrote to memory of 1652	4336	Comprovante_de_pagamento.pdf.exe	InstallUtil.exe
PID 4336 wrote to memory of 1652	4336	Comprovante_de_pagamento.pdf.exe	InstallUtil.exe
PID 4336 wrote to memory of 1652	4336	Comprovante_de_pagamento.pdf.exe	InstallUtil.exe
PID 4336 wrote to memory of 1652	4336	Comprovante_de_pagamento.pdf.exe	InstallUtil.exe
PID 4336 wrote to memory of 1652	4336	Comprovante_de_pagamento.pdf.exe	InstallUtil.exe
PID 4336 wrote to memory of 1652	4336	Comprovante_de_pagamento.pdf.exe	InstallUtil.exe
PID 4336 wrote to memory of 1652	4336	Comprovante_de_pagamento.pdf.exe	InstallUtil.exe
PID 4336 wrote to memory of 1652	4336	Comprovante_de_pagamento.pdf.exe	InstallUtil.exe

C:\Windows\Explorer.EXE
C:\Windows\Explorer.EXE
1⤵
PID:3376
- C:\Users\Admin\AppData\Local\Temp\Comprovante_de_pagamento.pdf.exe
  "C:\Users\Admin\AppData\Local\Temp\Comprovante_de_pagamento.pdf.exe"
  2⤵
  - Suspicious use of NtCreateUserProcessOtherParentProcess
  - Adds Run key to start application
  - Suspicious use of SetThreadContext
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:4336
- C:\Windows\Microsoft.NET\Framework\v4.0.30319\InstallUtil.exe
  "C:\Windows\Microsoft.NET\Framework\v4.0.30319\InstallUtil.exe"
  2⤵
  - System Location Discovery: System Language Discovery
  PID:1652

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

memory/1652-1096-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/1652-1099-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/4336-0-0x00000000746EE000-0x00000000746EF000-memory.dmp

Filesize
4KB

Download
memory/4336-1-0x0000000000290000-0x00000000002BA000-memory.dmp

Filesize
168KB

Download
memory/4336-2-0x00000000746E0000-0x0000000074E90000-memory.dmp

Filesize
7.7MB

Download
memory/4336-3-0x0000000005770000-0x000000000588C000-memory.dmp

Filesize
1.1MB

Download
memory/4336-21-0x0000000005770000-0x0000000005886000-memory.dmp

Filesize
1.1MB

Download
memory/4336-29-0x0000000005770000-0x0000000005886000-memory.dmp

Filesize
1.1MB

Download
memory/4336-57-0x0000000005770000-0x0000000005886000-memory.dmp

Filesize
1.1MB

Download
memory/4336-67-0x0000000005770000-0x0000000005886000-memory.dmp

Filesize
1.1MB

Download
memory/4336-65-0x0000000005770000-0x0000000005886000-memory.dmp

Filesize
1.1MB

Download
memory/4336-64-0x0000000005770000-0x0000000005886000-memory.dmp

Filesize
1.1MB

Download
memory/4336-61-0x0000000005770000-0x0000000005886000-memory.dmp

Filesize
1.1MB

Download
memory/4336-59-0x0000000005770000-0x0000000005886000-memory.dmp

Filesize
1.1MB

Download
memory/4336-55-0x0000000005770000-0x0000000005886000-memory.dmp

Filesize
1.1MB

Download
memory/4336-51-0x0000000005770000-0x0000000005886000-memory.dmp

Filesize
1.1MB

Download
memory/4336-47-0x0000000005770000-0x0000000005886000-memory.dmp

Filesize
1.1MB

Download
memory/4336-43-0x0000000005770000-0x0000000005886000-memory.dmp

Filesize
1.1MB

Download
memory/4336-41-0x0000000005770000-0x0000000005886000-memory.dmp

Filesize
1.1MB

Download
memory/4336-39-0x0000000005770000-0x0000000005886000-memory.dmp

Filesize
1.1MB

Download
memory/4336-37-0x0000000005770000-0x0000000005886000-memory.dmp

Filesize
1.1MB

Download
memory/4336-35-0x0000000005770000-0x0000000005886000-memory.dmp

Filesize
1.1MB

Download
memory/4336-31-0x0000000005770000-0x0000000005886000-memory.dmp

Filesize
1.1MB

Download
memory/4336-27-0x0000000005770000-0x0000000005886000-memory.dmp

Filesize
1.1MB

Download
memory/4336-25-0x0000000005770000-0x0000000005886000-memory.dmp

Filesize
1.1MB

Download
memory/4336-23-0x0000000005770000-0x0000000005886000-memory.dmp

Filesize
1.1MB

Download
memory/4336-19-0x0000000005770000-0x0000000005886000-memory.dmp

Filesize
1.1MB

Download
memory/4336-17-0x0000000005770000-0x0000000005886000-memory.dmp

Filesize
1.1MB

Download
memory/4336-15-0x0000000005770000-0x0000000005886000-memory.dmp

Filesize
1.1MB

Download
memory/4336-13-0x0000000005770000-0x0000000005886000-memory.dmp

Filesize
1.1MB

Download
memory/4336-11-0x0000000005770000-0x0000000005886000-memory.dmp

Filesize
1.1MB

Download
memory/4336-7-0x0000000005770000-0x0000000005886000-memory.dmp

Filesize
1.1MB

Download
memory/4336-5-0x0000000005770000-0x0000000005886000-memory.dmp

Filesize
1.1MB

Download
memory/4336-53-0x0000000005770000-0x0000000005886000-memory.dmp

Filesize
1.1MB

Download
memory/4336-49-0x0000000005770000-0x0000000005886000-memory.dmp

Filesize
1.1MB

Download
memory/4336-45-0x0000000005770000-0x0000000005886000-memory.dmp

Filesize
1.1MB

Download
memory/4336-33-0x0000000005770000-0x0000000005886000-memory.dmp

Filesize
1.1MB

Download
memory/4336-9-0x0000000005770000-0x0000000005886000-memory.dmp

Filesize
1.1MB

Download
memory/4336-4-0x0000000005770000-0x0000000005886000-memory.dmp

Filesize
1.1MB

Download
memory/4336-1078-0x00000000746E0000-0x0000000074E90000-memory.dmp

Filesize
7.7MB

Download
memory/4336-1079-0x0000000005AF0000-0x0000000005B86000-memory.dmp

Filesize
600KB

Download
memory/4336-1080-0x0000000005A80000-0x0000000005ACC000-memory.dmp

Filesize
304KB

Download
memory/4336-1084-0x00000000746E0000-0x0000000074E90000-memory.dmp

Filesize
7.7MB

Download
memory/4336-1085-0x00000000746E0000-0x0000000074E90000-memory.dmp

Filesize
7.7MB

Download
memory/4336-1087-0x00000000746E0000-0x0000000074E90000-memory.dmp

Filesize
7.7MB

Download
memory/4336-1088-0x00000000746E0000-0x0000000074E90000-memory.dmp

Filesize
7.7MB

Download
memory/4336-1086-0x00000000746EE000-0x00000000746EF000-memory.dmp

Filesize
4KB

Download
memory/4336-1089-0x0000000006330000-0x00000000068D4000-memory.dmp

Filesize
5.6MB

Download
memory/4336-1090-0x0000000005C30000-0x0000000005C84000-memory.dmp

Filesize
336KB

Download
memory/4336-1098-0x00000000746E0000-0x0000000074E90000-memory.dmp

Filesize
7.7MB

Download